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Finding the Fourth Proportional to 583,415.80, 875,123.70 and 209,390.20

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Solution

The fourth proportional to 583,415.80, 875,123.70 and 209,390.20 is: 314,085.30

Step by Step Solution

  1. Step 1: Write the proportion equation
    583,415.80 : 875,123.70 = 209,390.20 : x
  2. Step 2: Convert to fraction form
    583,415.80/875,123.70 = 209,390.20/x
  3. Step 3: Cross multiply
    583,415.80x = 875,123.70 × 209,390.20
  4. Step 4: Simplify right side
    583,415.80x = 183,242,326,567.74
  5. Step 5: Solve for x
    x = 183,242,326,567.74/583,415.80
  6. Step 6: Final answer
    x = 314,085.30

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Double scale
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Similar ratio
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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.50) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.