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Finding the Fourth Proportional to 423,153.66, 583,420.71 and 309,779.58

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Solution

The fourth proportional to 423,153.66, 583,420.71 and 309,779.58 is: 427,106.84

Step by Step Solution

  1. Step 1: Write the proportion equation
    423,153.66 : 583,420.71 = 309,779.58 : x
  2. Step 2: Convert to fraction form
    423,153.66/583,420.71 = 309,779.58/x
  3. Step 3: Cross multiply
    423,153.66x = 583,420.71 × 309,779.58
  4. Step 4: Simplify right side
    423,153.66x = 180,731,822,507.10
  5. Step 5: Solve for x
    x = 180,731,822,507.10/423,153.66
  6. Step 6: Final answer
    x = 427,106.84

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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.