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Finding the Fourth Proportional to 717,348.78, 990,417.78 and 445,821.84

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Solution

The fourth proportional to 717,348.78, 990,417.78 and 445,821.84 is: 615,530.25

Step by Step Solution

  1. Step 1: Write the proportion equation
    717,348.78 : 990,417.78 = 445,821.84 : x
  2. Step 2: Convert to fraction form
    717,348.78/990,417.78 = 445,821.84/x
  3. Step 3: Cross multiply
    717,348.78x = 990,417.78 × 445,821.84
  4. Step 4: Simplify right side
    717,348.78x = 441,549,877,048.32
  5. Step 5: Solve for x
    x = 441,549,877,048.32/717,348.78
  6. Step 6: Final answer
    x = 615,530.25

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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.38) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.