Home / 645,271.29-890,468.85-358,788.87

Finding the Fourth Proportional to 645,271.29, 890,468.85 and 358,788.87

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Solution

The fourth proportional to 645,271.29, 890,468.85 and 358,788.87 is: 495,125.57

Step by Step Solution

  1. Step 1: Write the proportion equation
    645,271.29 : 890,468.85 = 358,788.87 : x
  2. Step 2: Convert to fraction form
    645,271.29/890,468.85 = 358,788.87/x
  3. Step 3: Cross multiply
    645,271.29x = 890,468.85 × 358,788.87
  4. Step 4: Simplify right side
    645,271.29x = 319,490,312,461.70
  5. Step 5: Solve for x
    x = 319,490,312,461.70/645,271.29
  6. Step 6: Final answer
    x = 495,125.57

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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.