Home / 638,428.10-881,025-351,948.19

Finding the Fourth Proportional to 638,428.10, 881,025 and 351,948.19

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Solution

The fourth proportional to 638,428.10, 881,025 and 351,948.19 is: 485,685.32

Step by Step Solution

  1. Step 1: Write the proportion equation
    638,428.10 : 881,025 = 351,948.19 : x
  2. Step 2: Convert to fraction form
    638,428.10/881,025 = 351,948.19/x
  3. Step 3: Cross multiply
    638,428.10x = 881,025 × 351,948.19
  4. Step 4: Simplify right side
    638,428.10x = 310,075,154,094.75
  5. Step 5: Solve for x
    x = 310,075,154,094.75/638,428.10
  6. Step 6: Final answer
    x = 485,685.32

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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.