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Finding the Fourth Proportional to 434,709.60, 652,113.12 and 390,061.92

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Solution

The fourth proportional to 434,709.60, 652,113.12 and 390,061.92 is: 585,136.60

Step by Step Solution

  1. Step 1: Write the proportion equation
    434,709.60 : 652,113.12 = 390,061.92 : x
  2. Step 2: Convert to fraction form
    434,709.60/652,113.12 = 390,061.92/x
  3. Step 3: Cross multiply
    434,709.60x = 652,113.12 × 390,061.92
  4. Step 4: Simplify right side
    434,709.60x = 254,364,495,644.39
  5. Step 5: Solve for x
    x = 254,364,495,644.39/434,709.60
  6. Step 6: Final answer
    x = 585,136.60

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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.