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Finding the Fourth Proportional to 287,603,363.40, 431,405,045.10 and 239,773,673.40

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Solution

The fourth proportional to 287,603,363.40, 431,405,045.10 and 239,773,673.40 is: 359,660,510.10

Step by Step Solution

  1. Step 1: Write the proportion equation
    287,603,363.40 : 431,405,045.10 = 239,773,673.40 : x
  2. Step 2: Convert to fraction form
    287,603,363.40/431,405,045.10 = 239,773,673.40/x
  3. Step 3: Cross multiply
    287,603,363.40x = 431,405,045.10 × 239,773,673.40
  4. Step 4: Simplify right side
    287,603,363.40x = 103,439,572,386,919,680
  5. Step 5: Solve for x
    x = 103,439,572,386,919,680/287,603,363.40
  6. Step 6: Final answer
    x = 359,660,510.10

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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.