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Finding the Fourth Proportional to 679,130.39, 936,809.64 and 424,038.71

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Solution

The fourth proportional to 679,130.39, 936,809.64 and 424,038.71 is: 584,929.72

Step by Step Solution

  1. Step 1: Write the proportion equation
    679,130.39 : 936,809.64 = 424,038.71 : x
  2. Step 2: Convert to fraction form
    679,130.39/936,809.64 = 424,038.71/x
  3. Step 3: Cross multiply
    679,130.39x = 936,809.64 × 424,038.71
  4. Step 4: Simplify right side
    679,130.39x = 397,243,546,577.12
  5. Step 5: Solve for x
    x = 397,243,546,577.12/679,130.39
  6. Step 6: Final answer
    x = 584,929.72

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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.