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Finding the Fourth Proportional to 578,460.80, 869,764.80 and 487,222.40

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Solution

The fourth proportional to 578,460.80, 869,764.80 and 487,222.40 is: 732,580.14

Step by Step Solution

  1. Step 1: Write the proportion equation
    578,460.80 : 869,764.80 = 487,222.40 : x
  2. Step 2: Convert to fraction form
    578,460.80/869,764.80 = 487,222.40/x
  3. Step 3: Cross multiply
    578,460.80x = 869,764.80 × 487,222.40
  4. Step 4: Simplify right side
    578,460.80x = 423,768,893,291.52
  5. Step 5: Solve for x
    x = 423,768,893,291.52/578,460.80
  6. Step 6: Final answer
    x = 732,580.14

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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.