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Finding the Fourth Proportional to 423,347.40, 634,688.16 and 289,822.92

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Solution

The fourth proportional to 423,347.40, 634,688.16 and 289,822.92 is: 434,506.45

Step by Step Solution

  1. Step 1: Write the proportion equation
    423,347.40 : 634,688.16 = 289,822.92 : x
  2. Step 2: Convert to fraction form
    423,347.40/634,688.16 = 289,822.92/x
  3. Step 3: Cross multiply
    423,347.40x = 634,688.16 × 289,822.92
  4. Step 4: Simplify right side
    423,347.40x = 183,947,175,820.63
  5. Step 5: Solve for x
    x = 183,947,175,820.63/423,347.40
  6. Step 6: Final answer
    x = 434,506.45

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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.