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Finding the Fourth Proportional to 487,728.64, 671,569.86 and 426,959.20

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Solution

The fourth proportional to 487,728.64, 671,569.86 and 426,959.20 is: 587,894.39

Step by Step Solution

  1. Step 1: Write the proportion equation
    487,728.64 : 671,569.86 = 426,959.20 : x
  2. Step 2: Convert to fraction form
    487,728.64/671,569.86 = 426,959.20/x
  3. Step 3: Cross multiply
    487,728.64x = 671,569.86 × 426,959.20
  4. Step 4: Simplify right side
    487,728.64x = 286,732,930,169.71
  5. Step 5: Solve for x
    x = 286,732,930,169.71/487,728.64
  6. Step 6: Final answer
    x = 587,894.39

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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.